Submission #402912

#	Time	Username	Problem	Language	Result	Execution time	Memory
402912		jk410	화살표 그리기 (KOI18_arrowH)	C++17	100 / 100	45 ms	2580 KiB

arrow

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
struct point{
    int x,color;
    bool operator<(point t){
        if (color!=t.color)
            return color<t.color;
        return x<t.x;
    }
};
const int INF=1e9+1;
int N;
point A[100001];
ll Ans;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>N;
    for (int i=1; i<=N; i++)
        cin>>A[i].x>>A[i].color;
    sort(A+1,A+1+N);
    for (int i=1; i<=N; i++){
        int t=INF;
        if (i>1&&A[i-1].color==A[i].color)
            t=min(t,A[i].x-A[i-1].x);
        if (i<N&&A[i+1].color==A[i].color)
            t=min(t,A[i+1].x-A[i].x);
        if (t<INF)
            Ans+=t;
    }
    cout<<Ans;
    return 0;
}

• Subtask 1: 21 / 21
• Subtask 2: 12 / 12
• Subtask 3: 29 / 29
• Subtask 4: 38 / 38